输电塔减振的新型TMD开发与应用研究

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Abstract Aiming at high voltage transmission towers’ obvious vibration problems under strong wind and power line’s breakage impact, a spring plate type eddy-current tuned mass damper (ECTMD) was developed and applied to reduce their wind-induced vibration and power line’s breakage impact load effect on them. Compared to previous similar devices, it was shown that ECTMD’s outstanding advantage is using contactless eddy current damping, its structure is simple without internal frictional damping, and it can be started under micro-vibration; in addition, its asymmetric cantilever beam pendulum type structure makes itself has omnidirectional vibration suppression function. Adopting numerical simulation and aero-elastic model’s wind tunnel tests, vibration responses of a 50 m high transmission tower with and without ECTMD were analyzed and verified. Calculation and test results showed that this type ECTMD has a certain vibration reduction effect in all directions; with the mass ratio of about 2%, its vibration acceleration reduction ratio is 18%-27%, and its vibration displacement reduction rate is 10%-25%; due to the ratio of the tower’s first order resonance amplitude to background response one is very small, the suppressing effect of ECTMD on the tower’s wind induced vibration is relatively limited, while it can increase the structural damping by about 3 times, so it has a better effect to reduce power line’s breakage impact load effects on high voltage transmission towers.

Key words： power transmission tower；vibration control；eddy-current tunned mass damper；numerical simulation；wind tunnel test

Received: 09 January 2018 Published: 28 June 2019

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	Articles by authors
	LEI Xu1
	XIE Wenping1
	NIE Ming1
	NIU Huawei2
	CHEN Jinlin2
	WANG Yuxiang2

Cite this article:

LEI Xu1,XIE Wenping1,NIE Ming1, et al. Development and application of a new type of TMD in transmission tower vibration reduction[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(13): 73-80.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I13/73

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